Chassis frame, chassis and vehicle
Patent Information
- Application Number
- CN202380070138.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-01-20
- Publication Date
- 2025-05-13
AI Technical Summary
The existing skateboard chassis is difficult to be compatible with the load-bearing body, resulting in increased difficulty in adaptation, low integration, high cost, and problems in terms of collision safety and vibration and noise.
Design a chassis frame that closely connects the hollow structure of the battery frame, front axle bracket and rear axle bracket with the longitudinal beams and cross beams, and uses inclined plane design and sealant to improve the adaptability and connection stability with the car body, simplifying structure, reducing weight and enhancing crash safety.
It improves the adaptability of the chassis and the load-bearing body and the integration of the whole vehicle, reduces the weight and cost, enhances the collision safety and sealing effect, and simplifies the structural design.
Smart Images
Figure CN119998190A_ABST
Abstract
Description
Chassis frame, chassis and vehicle Technical Field
[0001] The present application relates to the field of vehicle technology, and in particular to a chassis frame, a chassis and a vehicle. Background Art
[0002] Skateboard chassis are a current hotspot and trend in chassis integration technology. Currently, skateboard chassis for passenger cars are typically developed with the upper and lower sections of the vehicle decoupled, with the body divided into an upper section and a main frame. This overall structure resembles a non-load-bearing body-on-frame design and is incompatible with the mainstream load-bearing body-on-frame architecture in the passenger car industry. Therefore, adapting these chassis to passenger car models requires extensive development, increasing design complexity and development investment costs. Furthermore, compared to a load-bearing body-on-frame design, the separation of the upper and lower sections reduces integration, negatively impacting vehicle cost, lightweighting, crash safety, and vibration and noise.
[0003] Summary of the Invention
[0004] The present application provides a chassis frame, a chassis and a vehicle to improve the adaptability of the chassis and the load-bearing body and to improve the integration of the entire vehicle.
[0005] In a first aspect, the present application provides a chassis frame capable of being detachably connected to a vehicle body, and may include a battery frame. The battery frame may include a base plate, two longitudinal beams, and two transverse beams disposed around the base plate, wherein the lengths of the two transverse beams extend in a first direction, and the lengths of the two longitudinal beams extend in a second direction, respectively. The base plate, the two longitudinal beams, and the two transverse beams may collectively form a storage space for accommodating the vehicle's battery. The transverse beam may be connected to the vehicle body via a first fastener; the longitudinal beam may include a first wall and a second wall, the first wall being disposed away from the base plate and parallel to the base plate, and the first wall being connectable to the side panel of the vehicle body via a second fastener; the second wall being disposed away from the storage space, and gradually tilting toward the storage space in a direction away from the base plate, and the second wall being adapted to engage with the inner side of the vehicle body.
[0006] In the above scheme, during the process of assembling the chassis frame and the vehicle body, the inclined design of the second wall of the longitudinal beam can be used to ensure the assembly gap between the battery frame and the vehicle body and reduce the difficulty of assembly, and can also improve the tightness of the fit between the second wall of the longitudinal beam and the side wall of the vehicle body. In conjunction with the connection between the first wall of the longitudinal beam and the side wall of the vehicle body in the horizontal plane, the longitudinal beam can achieve a close fit with the side wall of the vehicle body through the two walls, thereby improving the adaptability of the chassis and the load-bearing body, and further improving the integration of the entire vehicle structure.
[0007] In some possible implementation schemes, the interior of the longitudinal beam may be a hollow structure, which not only helps to reduce the weight of the chassis frame, but also enables the longitudinal beam to have a certain ability to absorb collision impact, thereby helping to improve the collision safety of the vehicle.
[0008] Likewise, the interior of the crossbeam may also be a hollow structure to further reduce the weight of the chassis frame.
[0009] In some possible implementations, the chassis frame may further include a front axle bracket and a rear axle bracket. The front axle bracket can be used to support the vehicle's front axle module, while the rear axle bracket can be used to support the vehicle's rear axle module. The front axle bracket and the rear axle bracket can be respectively arranged on either side of the battery frame along the second direction. The front axle bracket and the battery frame can share a common crossbeam, while the rear axle bracket and the battery frame can share another crossbeam. This design eliminates one crossbeam at each of the front and rear ends of the chassis frame, and accordingly eliminates two sets of front and rear connection points, thereby effectively simplifying the overall structure of the chassis frame.
[0010] In a specific implementation, the front axle bracket may include a first support beam and a second support beam, one end of the first support beam and one end of the second support beam are respectively fixedly connected to a cross beam, and the other end of the first support beam and the other end of the second support beam are respectively fixedly connected to the vehicle body, thereby realizing a design in which the front axle bracket and the battery frame share a cross beam. Similarly, the rear axle bracket may include a third support beam and a fourth support beam, one end of the third support beam and one end of the fourth support beam are respectively fixedly connected to another cross beam, and the other ends of the third support beam and the fourth support beam are respectively fixedly connected to the vehicle body, thereby realizing a design in which the rear axle bracket and the battery frame share a cross beam.
[0011] In some possible implementation schemes, sealant may be filled between the first wall of the longitudinal beam and the vehicle body side panel to further improve the connection reliability between the longitudinal beam and the vehicle body side panel.
[0012] Similarly, sealant may be filled between the second wall of the longitudinal beam and the body side panel to tightly connect the second wall to the body side panel, thereby reducing the risk of relative displacement between the longitudinal beam and the body side panel.
[0013] In some possible implementation schemes, the second wall of the longitudinal beam and the vehicle body side panel may be connected via a third fastener to further improve the connection stability between the longitudinal beam and the vehicle body side panel.
[0014] In some possible implementations, the accommodation space may be provided with one or more transverse beams arranged along a first direction. These transverse beams may be fixed to the floor or the two longitudinal beams on either side to divide the accommodation space into multiple subspaces, each of which may be used to accommodate a portion of the battery cells or the high-voltage electrical system. Along the first direction, the third fastener is positioned opposite the transverse beams. This allows the third fastener to be staggered relative to the subspaces. Therefore, in the event of a side impact, the third fastener will not occupy the crumple zone.
[0015] In some possible embodiments, the chassis frame may further include a battery cover. A first extension wall may be provided on the side of the chassis frame facing longitudinally into the accommodating space, and a second extension wall may be provided on the side of the crossbeam facing into the accommodating space. The first and second extension walls are spaced apart from the base plate. The edges of the battery cover may overlap the first and second extension walls, thereby sealing the batteries within the accommodating space.
[0016] In addition, in order to improve the sealing effect of the battery, the edge of the battery cover plate and the first extension wall and the second extension wall can be bonded together by using a sealant.
[0017] In some other possible implementation schemes, along the first direction, the two side edges of the battery cover plate can be overlapped on the first walls of the two longitudinal beams respectively, and along the second direction, the two side edges of the battery cover plate can be overlapped on the side of the two cross beams away from the bottom plate respectively. This can also enable the battery cover plate to achieve a sealing effect on the battery and also help save the lateral space of the entire vehicle.
[0018] In some possible implementations, the battery cover can be connected to the longitudinal beam via a fourth fastener to enhance the stability of the connection between the battery cover and the battery frame. Along the second direction, the fourth fastener and the second fastener can be staggered on the longitudinal beam. A clearance groove can be provided on the side of the vehicle body facing the chassis frame, corresponding to the fourth fastener, to provide clearance for the head of the fourth fastener.
[0019] In some possible implementations, the battery cover can also serve as the floor of the vehicle body, thereby simplifying the overall structure of the vehicle and reducing the height of the vehicle.
[0020] In a second aspect, the present application further provides a chassis frame that can be detachably connected to the body of a vehicle and may include a battery frame, a front axle bracket, and a rear axle bracket. The battery frame may include a base plate and two longitudinal beams and two cross beams arranged around the base plate. The lengths of the two cross beams extend in a first direction, and the lengths of the two longitudinal beams extend in a second direction. The base plate, the two longitudinal beams, and the two cross beams may together form a storage space for accommodating the battery of the vehicle. The cross beams may be connected to the body via a first fastener, and the longitudinal beams may be connected to the body via a second fastener. The front axle bracket may be used to carry the front axle module of the vehicle, and the rear axle bracket may be used to carry the rear axle module of the vehicle. The front axle bracket and the rear axle bracket may be respectively arranged on both sides of the battery frame along the second direction, and the front axle bracket may share a cross beam with the battery frame, and the rear axle bracket may share another cross beam with the battery frame. With this design, one crossbeam can be omitted at the front and rear of the chassis frame, and correspondingly, two sets of front and rear connection points can also be omitted, thereby effectively simplifying the overall structure of the chassis frame.
[0021] In some possible implementations, the front axle bracket may include a first support beam and a second support beam, with one end of the first support beam and one end of the second support beam respectively fixedly connected to a cross beam, and the other end of the first support beam and the other end of the second support beam respectively fixedly connected to the vehicle body, thereby realizing a design in which the front axle bracket and the battery frame share a cross beam. Similarly, the rear axle bracket may include a third support beam and a fourth support beam, with one end of the third support beam and one end of the fourth support beam respectively fixedly connected to another cross beam, and the other ends of the third support beam and the fourth support beam respectively fixedly connected to the vehicle body, thereby realizing a design in which the rear axle bracket and the battery frame share a cross beam.
[0022] In some possible implementations, the crossbeam can be connected to the vehicle body via a first fastener; the longitudinal beam has a first wall and a second wall, the first wall being disposed away from the bottom plate and parallel to the bottom plate, and being connectable to the vehicle body side panel via a second fastener, the second wall being disposed away from the accommodating space, and gradually tilting toward the accommodating space as it moves away from the bottom plate, and being adapted to engage with the inner side of the vehicle body. Thus, during assembly of the chassis frame and the vehicle body, the inclined design of the longitudinal beam's second wall can ensure an assembly gap between the battery frame and the vehicle body, reducing assembly difficulty, and also improve the tightness of the fit between the longitudinal beam's second wall and the vehicle body side panel. Combined with the horizontal connection between the longitudinal beam's first wall and the vehicle body side panel, the longitudinal beam can achieve a tight fit with the vehicle body side panel via these two walls, thereby improving the compatibility of the chassis and the load-bearing body, and thereby increasing the integration of the vehicle structure.
[0023] In some possible implementation schemes, the interior of the longitudinal beam may be a hollow structure, which not only helps to reduce the weight of the chassis frame, but also enables the longitudinal beam to have a certain ability to absorb collision impact, thereby helping to improve the collision safety of the vehicle.
[0024] Likewise, the interior of the crossbeam may also be a hollow structure to further reduce the weight of the chassis frame.
[0025] In some possible implementation schemes, sealant may be filled between the first wall of the longitudinal beam and the vehicle body side panel to further improve the connection reliability between the longitudinal beam and the vehicle body side panel.
[0026] Similarly, sealant may be filled between the second wall of the longitudinal beam and the body side panel to tightly connect the second wall to the body side panel, thereby reducing the risk of relative displacement between the longitudinal beam and the body side panel.
[0027] In some possible implementation schemes, the second wall of the longitudinal beam and the vehicle body side panel may be connected via a third fastener to further improve the connection stability between the longitudinal beam and the vehicle body side panel.
[0028] In some possible implementations, the accommodation space may be provided with one or more transverse beams arranged along a first direction. These transverse beams may be fixed to the floor or the two longitudinal beams on either side to divide the accommodation space into multiple subspaces, each of which may be used to accommodate a portion of the battery cells or the high-voltage electrical system. Along the first direction, the third fastener is positioned opposite the transverse beams. This allows the third fastener to be staggered relative to the subspaces. Therefore, in the event of a side impact, the third fastener will not occupy the crumple zone.
[0029] In some possible embodiments, the chassis frame may further include a battery cover. A first extension wall may be provided on the side of the chassis frame facing longitudinally into the accommodating space, and a second extension wall may be provided on the side of the crossbeam facing into the accommodating space. The first and second extension walls are spaced apart from the base plate. The edges of the battery cover may overlap the first and second extension walls, thereby sealing the batteries within the accommodating space.
[0030] In addition, in order to improve the sealing effect of the battery, the edge of the battery cover plate and the first extension wall and the second extension wall can be bonded together by using a sealant.
[0031] In some other possible implementation schemes, along the first direction, the two side edges of the battery cover plate can be overlapped on the first walls of the two longitudinal beams respectively, and along the second direction, the two side edges of the battery cover plate can be overlapped on the side of the two cross beams away from the bottom plate respectively. This can also enable the battery cover plate to achieve a sealing effect on the battery and also help save the lateral space of the entire vehicle.
[0032] In some possible implementations, the battery cover can be connected to the longitudinal beam via a fourth fastener to enhance the stability of the connection between the battery cover and the battery frame. Along the second direction, the fourth fastener and the second fastener can be staggered on the longitudinal beam. A clearance groove can be provided on the side of the vehicle body facing the chassis frame, corresponding to the fourth fastener, to provide clearance for the head of the fourth fastener.
[0033] In some possible implementations, the battery cover can also serve as the floor of the vehicle body, thereby simplifying the overall structure of the vehicle and reducing the height of the vehicle.
[0034] In a third aspect, the present application further provides a chassis, which may include the chassis frame of any possible embodiment of the first aspect or the second aspect, and has high adaptability to the vehicle body.
[0035] In some possible embodiments, when the chassis frame further includes a front axle bracket and a rear axle bracket, the chassis may further include a front axle module and a rear axle module. The front axle module may be carried on the front axle bracket, and the rear axle module may be carried on the rear axle bracket.
[0036] In some possible embodiments, the front axle module may include a front suspension, a front steering system, a front braking system, a thermal management system, and part of the electric drive system, and the rear axle module may include a rear suspension, a rear steering system, a rear braking system, and another part of the electric drive system.
[0037] In a fourth aspect, the present application further provides a vehicle, which may include the chassis of any possible embodiment of the third aspect, and which can achieve a high degree of integration.
[0038] In some possible embodiments, mounting plates corresponding to the longitudinal beam may be provided on both sides of the vehicle body along the first direction, and the mounting plates may extend along the second direction. The first wall of the longitudinal beam may be connected to the corresponding mounting plate by a first fastener, and the second wall of the longitudinal beam may be located on the inner side of the vehicle body side. In this way, the longitudinal beam can be closely matched with the vehicle body side through the two walls, thereby improving the adaptability of the chassis and the vehicle body, and further improving the integration of the entire vehicle structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0039] FIG1 is a schematic structural diagram of a vehicle provided in an embodiment of the present application;
[0040] FIG2 is a schematic diagram of a partially exploded structure of a vehicle provided in an embodiment of the present application;
[0041] FIG3 is a schematic structural diagram of a chassis provided in an embodiment of the present application;
[0042] FIG4 is a schematic structural diagram of the chassis frame shown in FIG3 ;
[0043] FIG5 is a schematic cross-sectional view of a local structure of a vehicle provided in an embodiment of the present application, taken perpendicularly to a second direction;
[0044] FIG6 is a schematic cross-sectional view of a local structure of a vehicle provided in an embodiment of the present application, taken along a direction perpendicular to a first direction;
[0045] FIG7 is a partial enlarged view of point A in FIG6;
[0046] FIG8 is a schematic cross-sectional view of a partial structure of another vehicle provided in an embodiment of the present application, taken perpendicularly to a first direction;
[0047] FIG9 is a schematic cross-sectional view of a partial structure of another vehicle provided in an embodiment of the present application, taken perpendicularly to the second direction;
[0048] FIG10 is another schematic cross-sectional view of the vehicle shown in FIG8 , taken perpendicular to the first direction.
[0049] Reference numerals:
[0050] 100 - body; 110 - front body wall; 120 - rear body wall; 130 - side body wall; 131 - mounting plate; 1311 - avoidance groove;
[0051] 200-chassis; 210-chassis frame; 211-battery frame; 2111-bottom plate; 2112-crossbeam;
[0052] 21121 - second extension wall; 2112a - first crossbeam; 2112b - second crossbeam; 2113 - longitudinal beam; 21131 - first wall;
[0053] 21132 - second wall; 21133 - first extension wall; 2114 - accommodation space; 21141 - subspace; 2115 - transverse beam;
[0054] 2116 - battery cover; 212 - front axle bracket; 2121 - first support beam; 2122 - second support beam; 2123 - third cross beam;
[0055] 213-rear axle bracket; 2131-third support beam; 2132-fourth support beam; 2133-fourth support beam;
[0056] 214-first fastener; 215-second fastener; 216-third fastener; 217-fourth fastener;
[0057] 220-front axle module; 230-rear axle module; 300-battery. DETAILED DESCRIPTION
[0058] In order to make the purpose, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted. The words expressing position and direction described in the embodiments of the present application are all explained using the accompanying drawings as examples, but changes may be made as needed, and the changes made are all included in the scope of protection of the present application. The drawings in the embodiments of the present application are only used to illustrate the relative position relationship and do not represent the true proportion.
[0059] It should be noted that the following description sets forth specific details to facilitate understanding of the present application. However, the embodiments of the present application can be implemented in a variety of ways other than those described herein, and those skilled in the art can make similar generalizations without violating the connotations of the embodiments of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.
[0060] In recent years, environmental pollution and energy shortages have accelerated the development and utilization of green and renewable energy. The development of new energy vehicles, represented by electric and hybrid vehicles, is a key measure for achieving energy conservation, emission reduction, and pollution prevention. Electric vehicles, by replacing fuel engines with electric motors, not only achieve zero emissions, low noise, and zero pollution, but also significantly conserve increasingly depleted petroleum resources. Hybrid vehicles, on the other hand, utilize both the long range and high power of engine-driven vehicles and the low noise and pollution-free nature of electric motors. With the increasing maturity and development of power battery technology, electric and hybrid vehicles are poised to become a major trend in the future automotive industry.
[0061] Figure 1 is a schematic diagram of the structure of a vehicle provided in an embodiment of the present application. Referring to Figure 1 , the vehicle includes, but is not limited to, an electric vehicle or a hybrid vehicle. The vehicle may include a body 100, a chassis 200, and a battery 300. The battery 300 may serve as a power source for the vehicle, providing electrical energy to drive the vehicle.
[0062] To improve the integration between chassis 200 and battery 300, the use of skateboard chassis, battery-chassis integration, or cell-to-body (CTB) integration has become a trend in current chassis and battery integration technologies. Taking the skateboard chassis as an example, a skateboard chassis integrates the vehicle's steering, braking, and three-electric systems (electric motor, power battery, and electronic control system) into the chassis in a modular manner. Using drive-by-wire technology, this chassis architecture decouples and separates the body from the chassis. While the skateboard chassis offers technical advantages, it lacks compatibility with the monocoque body architecture, making it difficult to achieve the desired effect in practical applications. A monocoque body, as used herein, lacks a separate frame and instead features structural reinforcements in areas such as the front, sides, rear, and floor. Assembly components such as the engine, front and rear suspension, and a portion of the transmission are mounted in designated locations on the body, with the vehicle load transmitted to the wheels via the suspension system. Monocoque bodies offer significant improvements in both safety and stability, with advantages such as low weight, low height, and ease of assembly, making them the mainstream passenger vehicle body structure.
[0063] The current design strategy for skateboard chassis for passenger cars is to develop a decoupled upper and lower vehicle body, with the upper and lower bodies separated. Specifically, the body is divided into an upper body and a main frame, with the overall structure similar to a non-load-bearing body. Therefore, the passenger car it is suitable for requires in-depth development of the model. For example, the body structure, structure, rigidity, and collision force transmission path strategy all need to be replanned, which greatly increases the difficulty of adaptation and development investment costs. In addition, compared to a load-bearing body, the architecture with separated upper and lower bodies has a lower degree of integration and an increased number of parts, which has certain negative impacts on the vehicle's cost, lightweight, collision safety, noise, vibration, and harshness (NVH).
[0064] The battery-chassis integration or battery-body integration technology used in the load-bearing body, taking into account the maintainability of the battery cells, requires the battery to have a separate complete battery pack form, or at least have a lower tray to support it. Therefore, it is impossible to achieve complete integration of the battery and the chassis / body, which limits the further improvement of the assembly efficiency.
[0065] To address the above issues, embodiments of the present application provide a chassis frame, a chassis and a vehicle using the chassis frame, to improve the compatibility between the chassis and the vehicle body and enhance the integration of the entire vehicle. The chassis frame will be described below with reference to specific embodiments.
[0066] FIG2 is a schematic diagram of a partially exploded structure of a vehicle provided in an embodiment of the present application. Referring to FIG2 , in an embodiment of the present application, the vehicle body 100 and the chassis 200 are detachably connected, and the battery can be arranged on the chassis 200. The vehicle body 100 can adopt a load-bearing structure. It should be noted that FIG2 only shows a partial structure of the load-bearing body. The vehicle body 100 includes a front body 110, a rear body 120, and left and right body side panels 130. The width direction of the vehicle is defined as the first direction and the length direction is defined as the second direction. The front body 110 and the rear body 120 extend respectively in the first direction, and the two are arranged relative to each other along the second direction. The left and right body side panels extend respectively in the second direction, and the side panels on both sides are arranged relative to each other along the first direction. The vehicle body 100 can be assembled with the chassis 200 through these parts.
[0067] FIG3 is a schematic diagram of the structure of a chassis 200 provided in an embodiment of the present application. Referring to FIG3 , in this embodiment, chassis 200 may include a chassis frame 210, a front axle module 220, and a rear axle module 230, with the front axle module 220 and the rear axle module 230 integrated onto the chassis frame 210. The front axle module 220 may include, but is not limited to, a front suspension, a front steering system, a front braking system, a thermal management system, and portions of the electric drive system. The rear axle module 230 may include, but is not limited to, a rear suspension, a rear steering system, a rear braking system, and portions of the electric drive system.
[0068] Referring to Figures 3 and 4 , Figure 4 is a schematic structural diagram of the chassis frame 210 shown in Figure 3 . In this embodiment of the present application, the chassis frame 210 may include a battery frame 211 and a front axle bracket 212 and a rear axle bracket 213 . The front axle bracket 212 and the rear axle bracket 213 are respectively connected to the two ends of the battery frame 211 along the second direction. The battery frame 211 may be used to carry the battery 300, and the front axle bracket 212 and the rear axle bracket 213 may be used to carry the front axle module 220 and the rear axle module 230, respectively.
[0069] In a specific implementation, the battery frame 211 may include a base plate 2111, two cross beams 2112, and two longitudinal beams 2113. The two cross beams 2112 may be disposed on opposite sides of the base plate 2111 along the second direction, and the two longitudinal beams 2113 may be disposed on opposite sides of the base plate 2111 along the first direction. Thus, a receiving space 2114 may be formed between the base plate 2111 and the two cross beams 2112 and two longitudinal beams 2113 surrounding the base plate 2111. This receiving space 2114 may be used to accommodate the battery 300. Furthermore, one or more cross beams 2115 may be disposed within the receiving space 2114. These cross beams 2115 may be fixed to the base plate 2111 below, or to the two longitudinal beams 2113 on either side. The transverse beam 2115 can be arranged parallel to the transverse beam 2112, thereby dividing the accommodating space 2114 into multiple subspaces 21141, and each subspace 21141 can be used to accommodate a part of the battery cell group 300 or the high-voltage electrical system.
[0070] In addition, the battery frame 211 may further include a battery cover 2116 (see FIG2 ). The battery cover 2116 may be connected to the ends of the two crossbeams 2112 and two longitudinal beams 2113 of the battery frame 211, respectively, away from the bottom plate 2111, thereby sealing the battery 300 disposed in the accommodating space 2114 and improving the safety of the battery 300. In some embodiments, the battery cover 2116 may also function as a vehicle floor, thereby simplifying the overall structure of the vehicle and reducing the height of the vehicle by approximately 10 mm.
[0071] Continuing with reference to Figures 3 and 4, the front axle bracket 212 can be fixed to the crossbeam 2112 on the front side of the battery frame 211, and the rear axle bracket 213 can be fixed to the crossbeam 2112 on the rear side of the battery frame 211. For ease of description, the crossbeams 2112 on the front and rear sides of the battery frame 211 are referred to as the first crossbeam 2112a and the second crossbeam 2112b, respectively. The front axle bracket 212 can include a first support beam 2121, a second support beam 2122, and a third crossbeam 2123. The first support beam 2121 and the second support beam 2122 can be arranged generally along the second direction. One end of the first support beam 2121 and one end of the second support beam 2122 are respectively fixedly connected to the first crossbeam 2112a, and the other ends of the first support beam 2121 and the other ends of the second support beam 2122 are respectively fixedly connected to the vehicle body. The third crossbeam 2123 can be connected between the first support beam 2121 and the second support beam 2122. In this case, the first crossbeam 2112a can serve as both the front crossbeam of the battery frame 211 and the rear crossbeam of the front axle bracket 212. That is, the front axle bracket 212 and the battery frame 211 can share the first crossbeam 2112a. For the entire chassis frame 210, this design not only eliminates a crossbeam on the front side of the chassis frame 210, but also eliminates a set of connection points between the front side of the chassis frame 210 and the vehicle body, thereby effectively simplifying the structure of the entire chassis frame 210. Furthermore, in this embodiment, the third crossbeam 2123 can be one or more, and the specific design can be based on the structure of the front axle module. FIG. 4 shows a case where the front axle bracket 212 includes two third crossbeams 2123.
[0072] Similarly, the rear axle bracket 213 may include a third support beam 2131, a fourth support beam 2132 and a fourth cross beam 2133, wherein the third support beam 2131 and the fourth support beam 2132 may be arranged roughly along the second direction, one end of the third support beam 2131 and one end of the fourth support beam 2132 are respectively fixedly connected to the second cross beam 2112b, the other end of the third support beam 2131 and the other end of the fourth support beam 2132 are respectively fixedly connected to the vehicle body, and the fourth cross beam 2133 is connected between the third support beam 2131 and the fourth support beam 2132. In this case, the second crossbeam 2112b serves as both the rear crossbeam of the battery frame 211 and the front crossbeam of the rear axle bracket 213. This means that the rear axle bracket 213 and the battery frame 211 can share a common crossbeam. This eliminates both a crossbeam on the rear side of the chassis frame 210 and a set of connection points between the rear side of the chassis frame 210 and the vehicle body, thereby simplifying the structure of the entire chassis frame 210. Analysis shows that by adopting an integrated chassis frame 210 design in which the front axle bracket 212 and the rear axle bracket 213 each share a common crossbeam with the battery frame 211, the vehicle's overall length can be shortened by approximately 100 mm.
[0073] Of course, in some other embodiments, in order to better adapt to existing vehicle models and existing production lines, the front axle bracket 212, the rear axle bracket 213 and the battery frame 211 can also be designed separately according to the design requirements of the target vehicle model and the assembly process of the production line, and connected to the vehicle body respectively during the final assembly of the vehicle.
[0074] With reference to Figures 3 to 5, Figure 5 is a schematic cross-sectional view of a local structure of a vehicle provided in an embodiment of the present application, perpendicular to the second direction. In the embodiment of the present application, in order to reduce the weight of the chassis frame 210, the interior of the crossbeam 2112 can be designed as a hollow structure while ensuring the structural strength of the battery frame 211. The two crossbeams 2112 of the battery frame 211 can be fixedly connected to the vehicle body 100 via first fasteners 214, respectively. For example, in a specific implementation, the first crossbeam 2112a can be fixedly connected to the front wall of the vehicle body via the first fastener 214, and the second crossbeam 2112b can be fixedly connected to the rear wall of the vehicle body via the first fastener 214. Exemplarily, the first fastener 214 can be a stud, one end of the first fastener 214 can be threadedly connected to the crossbeam 2112, and the other end can extend from the front wall or rear wall structure of the vehicle body and be locked by a nut. Alternatively, the first fastener 214 may be a bolt. In this case, a matching nut may be pre-fastened to the inner wall of the crossbeam 2112, and the end of the first fastener 214 may be tightened toward the crossbeam 2112. Furthermore, when the first fastener 214 is a stud, in addition to being used to securely connect the crossbeam 2112 to the vehicle body, it may also serve as a locating pin during assembly, thereby improving the assembly accuracy of the chassis and vehicle body.
[0075] FIG6 is a schematic cross-sectional view of a local structure of a vehicle provided in an embodiment of the present application, perpendicular to the first direction, and FIG7 is a partial enlarged view of point A in FIG6 . Referring to FIG6 and FIG7 together, when the chassis and the vehicle body are assembled, the two longitudinal beams 2113 of the battery frame 211 can be respectively located on the inner sides of the vehicle body side panels 130 on both sides, or it can be understood that, along the first direction, the battery frame 211 is located between the vehicle body side panels 130 on the left and right sides. In this way, the vehicle body side panels 130 and the longitudinal beams 2113 of the battery frame 211 can together form a protective structure for side collisions of the vehicle. In the event of a minor side collision of the vehicle, the vehicle body side panels 130 play a major protective role. If deformation occurs due to a collision, the vehicle body can be repaired separately, and the vehicle has good maintainability. In the event of a severe side collision, the body side 130 and the longitudinal beam 2113 of the battery frame 211 can jointly play a protective role. When the intrusion load destroys the outer protection of the body side 130 and then acts on the longitudinal beam 2113, the longitudinal beam 2113 can serve as a secondary protective barrier to effectively reduce the intrusion ability of the intrusion load, thereby reducing the risk of the battery being deformed by the impact of the collision, and thus reducing the possibility of dangers such as fire and explosion caused by this.
[0076] In addition, the interior of the longitudinal beam 2113 may also be a hollow structure, which not only helps to reduce the weight of the chassis frame, but also enables the longitudinal beam 2113 to have a certain ability to absorb collision impact, thereby helping to further improve the collision safety of the vehicle.
[0077] Continuing with Figures 6 and 7 , in some embodiments, the left and right body sides 130 may each be provided with a mounting plate 131 extending along the second direction. These two mounting plates 131 may be located inward of the corresponding body side 130 and opposite the longitudinal beams 2113 on either side. That is, along the height of the vehicle, the two longitudinal beams 2113 of the battery frame 211 may be located below these two mounting plates 131. The longitudinal beams 2113 may have a first wall 21131 facing away from the bottom plate 2111 and may be substantially parallel to the bottom plate 2111. When the chassis is assembled with the vehicle body, the first wall 21131 of the longitudinal beam 2113 may be securely connected to the corresponding mounting plate 131 via a second fastener 215. Multiple second fasteners 215 may be provided, and these fasteners 215 may be densely distributed along the second direction to enhance the connection strength between the longitudinal beam 2113 and the body side 130. Furthermore, since the first wall 21131 of the longitudinal beam 2113 is disposed away from the bottom plate 2111, the second fastener 215 and the battery 300 can be staggered in the height direction. When the vehicle is in a side collision, even if the second fastener 215 moves toward the inside of the vehicle under the action of the intrusion load, it will not cause a direct impact on the battery 300. Therefore, the second fastener 215 does not occupy the crumple space of the side collision, so that the lateral width of the entire vehicle can be reduced by about 20 mm.
[0078] In some embodiments, the second fastener 215 may be a stud, one end of which may be threadedly coupled to the first wall 21131 of the longitudinal beam 2113, while the other end may extend from the mounting plate 131 and be tightened by a nut. In other embodiments, the second fastener 215 may be a bolt. In this case, a matching nut may be pre-fastened to the inner wall of the first wall 21131 of the longitudinal beam 2113, and the second fastener 215 may be tightened from the mounting plate 131 toward the longitudinal beam 2113. Furthermore, when the second fastener 215 is a stud, in addition to being used to securely connect the longitudinal beam 2113 to the body side 130, it may also serve as a locating pin during assembly, thereby improving the assembly accuracy of the chassis and body.
[0079] In addition, in addition to the fastening connection of the second fastener 215, the first wall 21131 of the longitudinal beam 2113 and the mounting plate 131 can also be bonded by sealant to further improve the connection reliability between the first wall 21131 of the longitudinal beam 2113 and the vehicle body side 130.
[0080] In this embodiment, the longitudinal beam 2113 of the battery frame 211 further includes a second wall 21132 disposed away from the accommodating space. As previously described, the longitudinal beam 2113 of the battery frame 211 is located on the inner side of the vehicle body side panel 130. Therefore, the second wall 21132 is the wall of the longitudinal beam 2113 disposed toward the vehicle body side panel 130. In a specific design, the second wall 21132 can gradually slope toward the accommodating space 2114 in a direction away from the bottom plate 2111, i.e., in the height direction of the vehicle. In other words, along this direction, the width of the longitudinal beam 2113 in the first direction gradually decreases. In this case, the cross-section of the longitudinal beam perpendicular to the second direction can approximate a trapezoidal shape. Therefore, the battery frame 211 as a whole also tends to be narrow at the top and wide at the bottom, i.e., W1 < W2. When assembling the battery frame 211 with the vehicle body, it can be assembled from the bottom of the vehicle body. The inclined design of the second wall 21132 allows the upper width of the battery frame 211 to be narrower. Therefore, during the initial assembly phase, a certain assembly gap is created between the upper portion of the battery frame 211 and the vehicle body, allowing the battery frame 211 to smoothly fit between the two side panels of the vehicle body. This not only reduces the difficulty of assembly and positioning, but also improves the tightness of the fit between the second wall 21132 of the longitudinal beam 2113 and the body panel 130 after assembly. Combined with the horizontal connection between the first wall 21131 of the longitudinal beam 2113 and the mounting plate 131 of the body panel 130, the longitudinal beam 2113 can achieve a tight fit with the body panel 130 through these two walls, thereby improving the compactness of the entire vehicle structure. Analysis shows that after the chassis is assembled with the vehicle body, the lateral width of the entire vehicle can be reduced by approximately 10 mm.
[0081] In some embodiments, after the chassis and vehicle body are assembled, sealant can be filled into the gap between the second wall 21132 of the longitudinal beam 2113 and the body side panel 130. This ensures a tight connection between the second wall 21132 of the longitudinal beam 2113 and the body side panel 130, reducing the risk of relative displacement between the longitudinal beam 2113 and the body side panel 130. Furthermore, the second wall 21132 of the longitudinal beam 2113 and the body side panel 130 can be fixedly connected via third fasteners 216 to further enhance the stability of the connection between the longitudinal beam 2113 and the body side panel 130. For example, the third fasteners 216 can be bolts or studs, and their details are not further described herein.
[0082] In addition, when the second wall 21132 of the longitudinal beam 2113 is connected to the body side 130 through the third fastener 216, along the first direction, the third fastener 216 can be opposite to the cross beam 2115 (refer to Figure 4) arranged on the bottom plate 2111, so that the third fastener 216 can be staggered with the battery cell groups in each subspace 21141. Therefore, when the vehicle collides sideways, the third fastener 216 will not occupy the crumple space of the side collision.
[0083] Please refer to Figures 5 to 7. As mentioned above, the battery frame 211 may further include a battery cover 2116 for sealing the battery 300 in the accommodating space 2114. When the battery cover 2116 is connected to the battery frame 211, the two longitudinal beams 2113 of the battery frame 211 facing the accommodating space 2114 may be respectively provided with a first extension wall 21133, and the two cross beams 2112 facing the accommodating space 2114 may be respectively provided with a second extension wall 21121. The first extension wall 21133 and the second extension wall 21121 are both spaced apart from the bottom plate 2111, and the distances between the first extension wall 21133 and the second extension wall 21121 and the bottom plate 2111 are approximately the same. The edge of the battery cover 2116 may be overlapped on the two first extension walls 21133 and the two second extension walls 21121 on all four sides. In addition, in order to improve the sealing effect of the battery 300, the edge of the battery cover 2116 and the first extension wall 21133 and the second extension wall 21121 can also be bonded by using a sealant.
[0084] FIG8 is a schematic cross-sectional view of a partial structure of another vehicle provided in an embodiment of the present application, taken perpendicularly to a first direction, and FIG9 is a schematic cross-sectional view of a partial structure of another vehicle provided in an embodiment of the present application, taken perpendicularly to a second direction. Referring to FIG8 and FIG9 , in this embodiment, the longitudinal beams 2113 and transverse beams 2112 of the battery frame 211 may not be provided with the first extension wall and the second extension wall. In this case, when the battery cover 2116 is connected to the battery frame 211, along the first direction, the side edges of the battery cover 2116 may overlap the first walls 21131 of the two longitudinal beams 2113, respectively, and along the second direction, the side edges of the battery cover 2116 may overlap the sides of the two transverse beams 2112 facing away from the bottom plate 2111, respectively. This allows the battery cover 2116 to seal the battery 300 and helps save lateral space in the vehicle. Similarly, in order to improve the sealing effect of the battery 300, the edge of the battery cover 2116 can be bonded to the longitudinal beam 2113 and the transverse beam 2112 respectively by sealant.
[0085] In the above embodiment, when the chassis with the battery cover 2116 installed is assembled with the vehicle body, along the first direction, the two side edges of the battery cover 2116 are respectively located between the two longitudinal beams 2113 and the vehicle body side panel 130, and the battery cover 2116 may be provided with a first mounting hole (not shown in the figure) at the position corresponding to the first fastener 214. The second fastener 254 may pass through the first mounting hole to fix the longitudinal beam 2113 to the vehicle body side panel 130, and at the same time, the edge of the battery cover 2116 is clamped between the longitudinal beam 2113 and the mounting plate 131 of the vehicle body side panel 130. Along the second direction, the two side edges of the battery cover 2116 are respectively located between the two cross beams 2112 and the front or rear body of the vehicle. A second mounting hole (not shown in the figure) may be provided at the position of the battery cover 2116 corresponding to the first fastener 214. The first fastener 214 may pass through the second mounting hole to fix the cross beam 2112 to the front or rear body of the vehicle, while also clamping the edge of the battery cover 2116 between the cross beam 2112 and the front or rear body of the vehicle.
[0086] Figure 10 is another schematic cross-sectional view of the vehicle shown in Figure 8 taken perpendicular to the first direction. Referring to Figure 10 , to enhance the connection stability between the battery cover plate 2116 and the battery frame, the side edges of the battery cover plate 2116 may be connected to the longitudinal beam via fourth fasteners 217. There may be one or more fourth fasteners 217. Along the second direction, the fourth fasteners 217 and the second fasteners 215 used to securely connect the longitudinal beam 2113 to the body side 130 may be arranged alternately on the longitudinal beam 2113. For example, the fourth fasteners 217 may be bolts. In this case, nuts matching the fourth fasteners 217 may be pre-fastened to the inner wall of the first wall 21131 of the longitudinal beam 2113. The fourth fasteners 217 are then tightened from the mounting plate 131 of the body side 130 toward the longitudinal beam 2113. In addition, a position on the mounting plate 131 corresponding to the fourth fastener 217 may be further provided with an avoidance groove 1311 opened toward the longitudinal beam 2113 to avoid the head of the fourth fastener 217 .
[0087] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.
Claims
1. A chassis frame, characterized in that, It includes a battery frame, the battery frame includes a bottom plate, and two cross beams and two longitudinal beams surrounding the four sides of the bottom plate and forming a receiving space with the bottom plate, the receiving space is used to accommodate the battery, the lengths of the two cross beams extend along a first direction respectively, and the lengths of the two longitudinal beams extend along a second direction respectively; The cross beam is used to be connected to the vehicle body through a first fastener; The longitudinal beam has a first wall and a second wall, the first wall is arranged facing away from the bottom plate and is parallel to the bottom plate, the first wall is used to be connected to the vehicle body through a second fastener, the second wall is arranged facing away from the receiving space, and along the direction away from the bottom plate, the second wall gradually inclines towards the receiving space, and the second wall is used to cooperate with the inner side of the vehicle body.
2. The chassis frame according to claim 1, characterized in that, The inside of the longitudinal beam is a hollow structure.
3. The chassis frame according to claim 1 or 2, characterized in that, It further includes a front axle bracket and a rear axle bracket, the front axle bracket and the rear axle bracket are respectively arranged on two sides of the battery frame along the second direction, and the front axle bracket shares one of the cross beams with the battery frame, and the rear axle bracket shares the other cross beam with the battery frame; The front axle bracket is used to carry the front axle module of the vehicle, and the rear axle bracket is used to carry the rear axle module of the vehicle.
4. The chassis frame according to claim 3, characterized in that, The front axle bracket includes a first support beam and a second support beam, one end of the first support beam and one end of the second support beam are respectively fixedly connected to one of the cross beams, and the other end of the first support beam and the other end of the second support beam are respectively fixedly connected to the vehicle body; The rear axle bracket includes a third support beam and a fourth support beam, one end of the third support beam and one end of the fourth support beam are respectively fixedly connected to the other cross beam, and the other end of the third support beam and the other end of the fourth support beam are respectively fixedly connected to the vehicle body.
5. The chassis frame according to any one of claims 1 to 4, characterized in that Sealant is filled between the first wall and the vehicle body side wall; and / or, sealant is filled between the second wall and the vehicle body side wall.
6. The chassis frame according to any one of claims 1 to 5, characterized in that The second wall is connected to the vehicle body side wall through a third fastener.
7. The chassis frame according to claim 6, characterized in that, One or more cross partition beams arranged along the first direction are arranged in the receiving space, and the cross partition beams are fixed to the bottom plate; Along the first direction, the third fastener is opposite to the position of the cross partition beam.
8. The chassis frame according to any one of claims 1 to 7, characterized in that, The chassis frame further includes a battery cover; The surface of the longitudinal beam facing the receiving space has a first extending wall, and the surface of the cross beam facing the receiving space has a second extending wall, and the first extending wall and the second extending wall are respectively arranged at intervals with the bottom plate; The edge of the battery cover overlaps on the first extending wall and the second extending wall.
9. The chassis frame according to any one of claims 1 to 7, characterized in that, The chassis frame further includes a battery cover; Along the first direction, the two side edges of the battery cover respectively overlap on the first walls of the two longitudinal beams; Along the second direction, the two side edges of the battery cover respectively overlap on the surfaces of the two cross beams facing away from the bottom plate.
10. The chassis frame according to claim 9, characterized in that, The battery cover is connected to the longitudinal beam through a fourth fastener, and the vehicle body has an avoidance groove at a position corresponding to the fourth fastener on the side facing the chassis frame; Along the second direction, the fourth fastener and the second fastener are staggered on the longitudinal beam.
11. The chassis frame according to any one of claims 8 to 10, characterized in that, The battery cover plate is formed as the floor of the vehicle.
12. A chassis, characterized in that, Comprising the chassis frame according to any one of claims 1 to 11.
13. The chassis according to claim 12, characterized in that, When the chassis frame further includes a front axle bracket and a rear axle bracket, the chassis further includes a front axle module and a rear axle module, the front axle module is carried on the front axle bracket, and the rear axle module is carried on the rear axle bracket.
14. The chassis according to claim 13, characterized in that, The front axle module includes a front suspension, a front steering system, a front braking system, a thermal management system, and a part of the electric drive system, and the rear axle module includes a rear suspension, a rear steering system, a rear braking system, and another part of the electric drive system.
15. A vehicle, characterized in that, Comprising a vehicle body and the chassis according to any one of claims 12 to 14.
16. The vehicle according to claim 15, wherein Further comprising a vehicle body, the opposite sides of the vehicle body along the first direction are respectively provided with mounting plates corresponding to the longitudinal beams, the length of the mounting plates extends along the second direction, and the longitudinal beams are connected to the corresponding mounting plates through the first fasteners.